linux-ext4 - Re: norecovery option for ext3

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Message-id: <745F9F90-6F43-4DA1-92B7-0AC09E07981C@sun.com>
Date:	Fri, 20 Nov 2009 09:41:02 -0800
From:	Andreas Dilger <adilger@....com>
To:	Eric Sandeen <sandeen@...hat.com>
Cc:	Jan Kara <jack@...e.cz>, linux-ext4@...r.kernel.org, tytso@....edu
Subject: Re: norecovery option for ext3

On 2009-11-20, at 07:46, Eric Sandeen wrote:
> Jan Kara wrote:
>>  I've tried to test noload/norecovery option of ext3 and I've found  
>> it simply does not work. The filesystem does not even mount.

>>  Given that nobody used the option (OK, some googling shows that  
>> somebody tried to use it in *2.4.9* kernel and it didn't work even  
>> there - Stephen Tweedie comments that it's an obsolete option meant  
>> for use during fs development) and seeing how badly corrupted the  
>> filesystem is when you don't replay the journal, I'd just remove  
>> the option. Any opinions?
>
> Oh, sigh.  Sorry, didn't actually, er, test it, since I was just  
> adding an alias for the option... bleah.
>
> I think we should fix it; there are cases when you may want to mount  
> that way, I think - for example, otherwise there is no way at all to  
> mounta block device which is marked readonly...


Won't this require implementing "no journal" mode for ext3?  Seems  
like a lot of effort, when ext4 does the same thing (i.e. they could  
just mount the filesystem "-t ext4 -o norecovery" if they really,  
really need to do that).

Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.

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